With increase in the number of shell passes, the value of FT

Process Equipment and Plant Design
With increase in the number of shell passes, the value of FT

Remains same, only if the number of tube passes does not change

Decreases

Increases

Remains same

Remains same, only if the number of tube passes does not change

Decreases

Increases

Remains same

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Process Equipment and Plant Design
Liquid gradient over a tray can be minimised by

Decreasing the number of rows of caps through which the liquid flows or by decreasing the velocity of liquid flow past the caps or by reducing the distance along the tray through which the liquid must

Using split flow, radial flow or cascade flow for column diameter large than 4 ft

Providing a higher skirt clearance or a higher weir

All of these

Decreasing the number of rows of caps through which the liquid flows or by decreasing the velocity of liquid flow past the caps or by reducing the distance along the tray through which the liquid must

Using split flow, radial flow or cascade flow for column diameter large than 4 ft

Providing a higher skirt clearance or a higher weir

All of these

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Process Equipment and Plant Design
Bubble cap tray is the most commonly used tray in large distillation column, because

Of its flexibility and nearly constant efficiency under varying conditions of operation

It eliminates the foaming and entrain-ment tendency during operation

None of these

It incurs less pressure drop as compared to any other try designed for the same duty

Of its flexibility and nearly constant efficiency under varying conditions of operation

It eliminates the foaming and entrain-ment tendency during operation

None of these

It incurs less pressure drop as compared to any other try designed for the same duty

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Process Equipment and Plant Design
Pick out the wrong statement pertaining to the design of the bubble cap tray of a distillation column to give stable operation and even vapour distribution.

None of these

The pressure drop due to the caps & slots and the static submergence should be as high as practicable for reasonable operation

Tendency towards stable operation is increased by increasing the skirt clearance of the caps, lowering the rate of liquid flow per unit plate width or increasing the spacing between the caps

The dimensionless ratio of liquid gradient to pressure drop head caused by the bubble cap assembly should be less than 0.4

None of these

The pressure drop due to the caps & slots and the static submergence should be as high as practicable for reasonable operation

Tendency towards stable operation is increased by increasing the skirt clearance of the caps, lowering the rate of liquid flow per unit plate width or increasing the spacing between the caps

The dimensionless ratio of liquid gradient to pressure drop head caused by the bubble cap assembly should be less than 0.4

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Process Equipment and Plant Design
In seive plate column, holes are drilled or punched in sizes ranging from 2.5 to 12 mm (5 mm being widely used). The hole pitch is normally __________ times the hole diameter to give the required hole area.

2.5 to 4.0

0.5 to 1.5

10 to 15

5 to 10

2.5 to 4.0

0.5 to 1.5

10 to 15

5 to 10

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Process Equipment and Plant Design
Pick out the wrong statement about the design of seive plate column and the bubble cap column.

Weir height in case of a bubble cap plate ranges from 50 to 150 mm and is higher than the seive plate

The downcomer design and the residence time in the downcomer is almost same for seive plate and bubble cap columns

Weir length for a bubble cap plate is the same as that for the seive plate

Weir height for a bubble cap plate column is the same as that for a seive plate column

Weir height in case of a bubble cap plate ranges from 50 to 150 mm and is higher than the seive plate

The downcomer design and the residence time in the downcomer is almost same for seive plate and bubble cap columns

Weir length for a bubble cap plate is the same as that for the seive plate

Weir height for a bubble cap plate column is the same as that for a seive plate column

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Process Equipment and Plant Design

Process Equipment and Plant Design With increase in the number of shell passes, the value of FT

Process Equipment and Plant Design Liquid gradient over a tray can be minimised by

Process Equipment and Plant Design Bubble cap tray is the most commonly used tray in large distillation column, because

Process Equipment and Plant Design Pick out the wrong statement pertaining to the design of the bubble cap tray of a distillation column to give stable operation and even vapour distribution.

Process Equipment and Plant Design In seive plate column, holes are drilled or punched in sizes ranging from 2.5 to 12 mm (5 mm being widely used). The hole pitch is normally __________ times the hole diameter to give the required hole area.

Process Equipment and Plant Design Pick out the wrong statement about the design of seive plate column and the bubble cap column.

Process Equipment and Plant Design
With increase in the number of shell passes, the value of FT

Process Equipment and Plant Design
Liquid gradient over a tray can be minimised by

Process Equipment and Plant Design
Bubble cap tray is the most commonly used tray in large distillation column, because

Process Equipment and Plant Design
Pick out the wrong statement pertaining to the design of the bubble cap tray of a distillation column to give stable operation and even vapour distribution.

Process Equipment and Plant Design
In seive plate column, holes are drilled or punched in sizes ranging from 2.5 to 12 mm (5 mm being widely used). The hole pitch is normally __________ times the hole diameter to give the required hole area.

Process Equipment and Plant Design
Pick out the wrong statement about the design of seive plate column and the bubble cap column.